The present invention is directed to reduce fluctuations in modulation frequency of a VCO caused by a temperature change in a semiconductor integrated circuit for use in a radio communication system of a frequency hopping method performing modulation by controlling the VCO of an LC oscillation type in accordance with transmission data in an open loop by using the VCO. Preferably, said E-SBR is exclusive of functional groups reactive with alkoxy groups other than said hydroxyl functional groups. An active layer is sandwiched between the first and second conduction layers, to increase a contact area between the active layer and the first conduction layer and the second conduction layer. When configured to reject RCF messages, the Switch Port that receives an RCF message will generate a reject message along with a reason code explanation \u201cE_Port Isolated\u201d, and then transition into an Isolated state.